DEMA VPM 400 D - User Manual

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DPM 400 D
DIRECTIONAL PROTECTION RELAY
USER GUIDE

Summary

Physical Properties of 400 Series Relays

Main Menu

4.2 Measurements

Protection Settings

4.3.1 Protection and Reset Curves

Defines IEC/IEEE/ANSI and custom inverse time curves.

4.3.2 Current Protection Settings

Configuration for phase and earth overcurrent, overload protection.

4.3.2.1 50;51 P - Phase Overcurrent Protection

Settings for phase overcurrent protection.

4.3.2.2 Earth Overcurrent Protection

Configuration for earth fault overcurrent detection.

4.3.2.3 49 - Thermal Overload Protection

Manages thermal overload protection for equipment.

4.3.3 Voltage Protection Settings

Configuration for over/under voltage and negative sequence voltage.

4.3.3.1 59 - Over voltage Protection

Settings for overvoltage detection and operation.

4.3.3.2 27- Under Voltage Protection

Configuration for undervoltage detection and operation.

4.3.4 Frequency Protection Settings

Configuration for under, over, and rate-of-change frequency protection.

4.3.4.1 81 U - Under Frequency Protection

4.3.4.2 81 O - Over Frequency Protection

4.3.5 Power Protection Settings

4.3.5.1 32 OP - Directional Active Over Power

Detects and protects against directional active over power.

4.3.5.5 32 N - Wattmetric Earth Protection

Automatic control

4.4.1 46 BC - Broken Conductor

4.4.11 51 V - Voltage Controlled Overcurrent

Configuration

DEMA VPM 400 D Specifications

General

Rated operational voltage	400 V AC
Rated operational current	16 A
Utilization category	AC-1
Electrical durability	100, 000 operations
Number of poles	4
Voltage	400V AC
Mechanical durability	10, 000, 000 operations
Coil voltage	24 V DC